When starting apicast with APICAST_SERVICE_8_CONFIGURATION_VERSION=2 the configuration fetch for this service fails with the following error in system-app's log:
10.8.40.12 - - [28/Mar/2017:11:15:28 +0000] "GET /admin/api/services/8/proxy/configs/sandbox/2.json HTTP/1.1" 404 - 0.0102
The reason for this is that the configuration file is (very likely incorrectly) available under different identifier
/admin/api/services/8/proxy/configs/sandbox/12.json
Notice the difference in the